Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components/polymer/src/lib/settings.html

Index: third_party/polymer/v0_8/components/polymer/src/lib/settings.html
diff --git a/third_party/polymer/v0_8/components/polymer/src/lib/settings.html b/third_party/polymer/v0_8/components/polymer/src/lib/settings.html
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+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<script>
+
+  Polymer = {
+    Settings: (function() {
+      // NOTE: Users must currently opt into using ShadowDOM. They do so by doing:
+      // Polymer = {dom: 'shadow'};
+      // TODO(sorvell): Decide if this should be auto-use when available.
+      // TODO(sorvell): if SD is auto-use, then the flag above should be something
+      // like: Polymer = {dom: 'shady'}
+      
+      // via Polymer object
+      var user = window.Polymer || {};
+
+      // via url
+      location.search.slice(1).split('&').forEach(function(o) {
+        o = o.split('=');
+        o[0] && (user[o[0]] = o[1] || true);
+      });
+
+      var wantShadow = (user.dom === 'shadow');
+      var hasShadow = Boolean(Element.prototype.createShadowRoot);
+      var nativeShadow = hasShadow && !window.ShadowDOMPolyfill;
+      var useShadow = wantShadow && hasShadow;
+
+      var hasNativeImports = Boolean('import' in document.createElement('link'));
+      var useNativeImports = hasNativeImports;
+
+      var useNativeCustomElements = (!window.CustomElements ||
+        window.CustomElements.useNative);
+
+      return {
+        wantShadow: wantShadow,
+        hasShadow: hasShadow,
+        nativeShadow: nativeShadow,
+        useShadow: useShadow,
+        useNativeShadow: useShadow && nativeShadow,
+        useNativeImports: useNativeImports,
+        useNativeCustomElements: useNativeCustomElements
+      };
+    })()
+  };
+
+</script>